Shelfwise exists because a discount is not automatically a saving. A yellow sticker, a "3 for 2" shelf label and a two-for-one coupon can each be excellent value or quietly expensive, and the difference usually comes down to details printed in six-point type. We explain those details.
On themews.xyz you will find explainers on how supermarket markdown cycles work, how to read unit prices instead of headline prices, when multi-buys beat single items and when they simply push you to buy more than you need, how loyalty programmes calculate their "member price", and which coupon terms — minimum spend, exclusions, one-per-transaction, stacking limits — decide whether an offer applies to your basket at all.
Our approach is editorial and practical. We describe mechanics and give worked examples with round numbers, we flag the common traps, and we point you to the retailer's own terms and app as the final authority. Prices, promotions and store policies vary by country, chain and week, so we treat every specific figure as an illustration rather than a promise.
The site is written for everyday shoppers: households trying to trim a weekly food bill, students learning to budget, and anyone who suspects they are paying more than they should for the same groceries. No membership, no checkout, no products for sale — just information you can carry into the aisle on your phone.
We are independent of the stores and coupon platforms we discuss, and we welcome corrections. If a guide is out of date or an example no longer matches reality, write to us via the Contact page and we will fix it. Please also read our Disclaimer to understand the limits of what we publish.